normalizing the color type

Author: smnh

lib/sanity-util.js

@@ -210,6 +210,10 @@ function normalizeValue({ cache, entriesById, options, value, visitedIds }) {
         return value.current;
     }
 
+    if (value._type === 'color') {
+        return value.hex;
+    }
+
     if (value._type === 'reference') {
         const { _ref: referenceId } = value;
         const referencedEntry = entriesById[referenceId];